Method and system for determining wellbore breakdown pressures for hydraulic stimulation operations

Abstract

A method may include performing, by a drilling system, a drilling operation to produce a wellbore in a geological region of interest. The method may further include determining time elapse data describing an amount of time between the drilling operation and a hydraulic stimulation operation. The method may further include determining borehole stress data based on the wellbore, reservoir data, and geological data. The method may further include determining thermal diffusivity data regarding a temperature front in the geological region of interest based on the time elapse data, the reservoir data, and the geological data. The method may further include determining a wellbore breakdown pressure of the geological region of interest based on the thermal diffusivity data, the geological data, the borehole stress data, and the reservoir data. The method may further include transmitting a command to a stimulation control system based on the wellbore breakdown pressure.

What is claimed: 
     
         1 . A method, comprising:
 obtaining reservoir data for a first geological region of interest;   obtaining geological data regarding one or more formations in the first geological region of interest;   performing, by a first drilling system comprising a drill bit and a drill string, a first drilling operation to produce a first wellbore in the first geological region of interest;   determining, by a computer processor, first time elapse data describing an amount of time between the first drilling operation and a first hydraulic stimulation operation;   determining, by the computer processor, borehole stress data based on the first wellbore, the reservoir data, and the geological data;   determining, by the computer processor, thermal diffusivity data regarding one or more temperature fronts in the first geological region of interest based on the first time elapse data, the reservoir data, and the geological data;   determining, by the computer processor, a first wellbore breakdown pressure of the first geological region of interest based on the thermal diffusivity data, the geological data, the borehole stress data, and the reservoir data; and   transmitting, by the computer processor, a first command to a stimulation control system based on the first wellbore breakdown pressure,   wherein the stimulation control system performs a hydraulic stimulation operation at the first wellbore based on the first wellbore breakdown pressure and in response to the first command.   
     
     
         2 . The method of  claim 1 , further comprising:
 determining a change in pressure in the first geological region of interest based on the one or more temperature fronts diffusing throughout the first geological region of interest based on the amount of time between the first drilling operation and the first hydraulic stimulation operation, and   wherein the first wellbore breakdown pressure is based on the change in pressure.   
     
     
         3 . The method of  claim 1 , further comprising:
 obtaining wellbore data regarding the first wellbore, wherein the wellbore data comprises a wellbore radius of the first wellbore, inclination angle data of the first wellbore, and an azimuth of the first wellbore;   determining a vertical stress on the first wellbore, a maximum horizontal stress on the first wellbore, and a minimum horizontal stress on the first wellbore using the wellbore data and the reservoir data;   determining a plurality of stress components of the first wellbore based on the inclination angle data, a plurality of borehole coordinates, the vertical stress, the maximum horizontal stress, and the minimum horizontal stress; and   determining confining stress data for the first wellbore based on the plurality of stress components,   wherein the borehole stress data comprises the confining stress data.   
     
     
         4 . The method of  claim 3 ,
 wherein the wellbore data comprises vertical stress data on the first wellbore, minimum horizontal stress data on the first wellbore, and maximum horizontal stress data on the first wellbore.   
     
     
         5 . The method of  claim 1 ,
 wherein the reservoir data comprises reservoir pore pressure data and reservoir temperature data.   
     
     
         6 . The method of  claim 1 ,
 wherein the geological data comprises formation density data, Young's modulus data, Poisson's ratio data, thermal conductivity data, specific heat data, and thermal expansion coefficient data.   
     
     
         7 . The method of  claim 1 , further comprising:
 obtaining second time elapse data for a second drilling operation and a second hydraulic stimulation operation;   determining whether a second geological region of interest is disposed in a thermal steady state based on the second time elapse data,   wherein the second geological region of interest surrounds a second wellbore that is drilled by the second drilling operation; and   determining, in response to determining that the second geological region of interest being in the thermal steady state, a second wellbore breakdown pressure,   wherein the second wellbore breakdown pressure is time independent.   
     
     
         8 . The method of  claim 1 , further comprising:
 obtaining permeability data regarding the first geological region of interest; and   determining whether the permeability data satisfies a predetermined permeability threshold,   wherein the first wellbore breakdown pressure is based on the permeability data satisfying the predetermined permeability threshold.   
     
     
         9 . The method of  claim 1 , further comprising:
 performing a second drilling operation at a second wellbore in the first geological region of interest, wherein the second drilling operation acquires a plurality of cuttings from drilling fluid circulated in the second wellbore during the second drilling operation; and   determining cutting data from the plurality of cuttings,   wherein a portion of the geological data is based on the cutting data.   
     
     
         10 . The method of  claim 1 , further comprising:
 acquiring, using a coring system comprising a coring tool, one or more core samples from a second wellbore in the first geological region of interest; and   determining core sample data using the one or more core samples,   wherein a portion of the geological data is based on the core sample data.   
     
     
         11 . The method of  claim 1 , further comprising:
 acquiring temperature data for the first geological region of interest using a plurality of downhole temperature sensors disposed in the first wellbore;   acquiring pressure data for the first geological region of interest using a plurality of downhole pressure sensors disposed in the first wellbore,   wherein the reservoir data comprises the temperature data and the pressure data.   
     
     
         12 . The method of  claim 1 ,
 wherein the hydraulic stimulation operation sends a hydraulic fracturing fluid into the first wellbore at a predetermined flow rate using a pump system,   wherein the hydraulic fracturing fluid comprises at least one propping agent, and   wherein the hydraulic fracturing fluid produces a fracture network laterally from the first wellbore.   
     
     
         13 . A system, comprising:
 a drilling system comprising a drill bit and a drill string;   a stimulation control system; and   a reservoir simulator coupled to the stimulation control system, the reservoir simulator comprising a computer processor,   wherein the drilling system is configured to perform a first drilling operation to produce a wellbore in a geological region of interest, and   wherein the reservoir simulator is configured to perform a method comprising:
 obtaining reservoir data for the geological region of interest, 
 obtaining geological data regarding one or more formations in the geological region of interest, 
 determining time elapse data describing an amount of time between the first drilling operation and a first hydraulic stimulation operation, 
 determining borehole stress data based on the wellbore, the reservoir data, and the geological data, 
 determining thermal diffusivity data regarding one or more temperature fronts in the geological region of interest based on the time elapse data, the reservoir data, and the geological data, and 
 determining a first wellbore breakdown pressure of the geological region of interest based on the thermal diffusivity data, the geological data, the borehole stress data, and the reservoir data, 
 wherein the stimulation control system performs a hydraulic stimulation operation at the wellbore based on the first wellbore breakdown pressure. 
   
     
     
         14 . The system of  claim 13 , further comprising:
 a user device coupled to the stimulation control system,   wherein the user device is configured to provide a graphical user interface for presenting a plurality of wellbore breakdown pressures, and   wherein the first wellbore breakdown pressure is selected among the plurality of wellbore breakdown pressures.   
     
     
         15 . The system of  claim 13 , wherein the method further comprises:
 determining a change in pressure in the geological region of interest based on the one or more temperature fronts diffusing throughout the geological region of interest based on the amount of time between the first drilling operation and the first hydraulic stimulation operation, and   wherein the first wellbore breakdown pressure is based on the change in pressure.   
     
     
         16 . The system of  claim 13 , wherein the method further comprises:
 obtaining wellbore data regarding the wellbore, wherein the wellbore data comprises a wellbore radius of the wellbore, inclination angle data of the wellbore, and an azimuth of the wellbore;   determining a vertical stress on the wellbore, a maximum horizontal stress on the wellbore, and a minimum horizontal stress on the wellbore using the wellbore data and the reservoir data;   determining a plurality of stress components of the wellbore based on the inclination angle data, a plurality of borehole coordinates, the vertical stress, the maximum horizontal stress, and the minimum horizontal stress; and   determining confining stress data for the wellbore based on the plurality of stress components,   wherein the borehole stress data comprises the confining stress data.   
     
     
         17 . The system of  claim 13 ,
 wherein the geological data comprises formation density data, Young's modulus data, Poisson's ratio data, thermal conductivity data, specific heat data, and thermal expansion coefficient data.   
     
     
         18 . The system of  claim 13 , wherein the method further comprises:
 obtaining permeability data regarding the geological region of interest; and   determining whether the permeability data satisfies a predetermined permeability threshold,   wherein the first wellbore breakdown pressure is based on the permeability data satisfying the predetermined permeability threshold.   
     
     
         19 . The system of  claim 13 , wherein the method further comprises:
 acquiring temperature data for the geological region of interest using a plurality of downhole temperature sensors disposed in the wellbore;   acquiring pressure data for the geological region of interest using a plurality of downhole pressure sensors disposed in the wellbore,   wherein the reservoir data comprises the temperature data and the pressure data.   
     
     
         20 . The system of  claim 13 ,
 wherein the hydraulic stimulation operation sends a hydraulic fracturing fluid into the wellbore at a predetermined flow rate using a pump system,   wherein the hydraulic fracturing fluid comprises at least one propping agent, and   wherein the hydraulic fracturing fluid produces a fracture network laterally from the wellbore.